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Apr 9, 2017 at 4:26 vote accept Andrei Grigore
Apr 8, 2017 at 23:21 comment added Whit3rd A battery does not store current. A battery rated in 'mAh' is storing milliampere-hours, i.e. it's storing electrical charge.
Apr 8, 2017 at 21:12 answer added Fred Cailloux timeline score: 1
Apr 8, 2017 at 21:07 comment added Simon B For the lead-acid battery, 55Ah would mean 1A for 55 hours. But lead acid batteries don't last so long if run flat, so it's best to assume only about half the rated capacity if you want a long life. The 550A is the maximum current that the battery can produce for just a few seconds - such as when starting a car.
Apr 8, 2017 at 20:11 comment added winny You are confusing energy with power. Do a search here and there are several questions about it. Regarding you lithium batteries, the capacity is rated between two voltages, not 4.2 down to 0 but 4.2 down to about 3 V. Check the datasheet for the battery in question m, it's specified for sure.
Apr 8, 2017 at 20:05 history asked Andrei Grigore CC BY-SA 3.0